Can the output voltage and current be monitored when multiple units of PCR-LE series are used?

Yes, the output voltage and current can be monitored via digital communication. However, it is important to note that analog voltage and current monitor outputs are not available.
The standard interface for PCR-LE series is RS232C, but upon your request, an optional interface board for either LAN, GPIB, or USB can be provided.
For detailed information on the commands, read the communication interface manual.